Ventilator.



PATENTED NOV. l0, 1903.

E. P. GLN/ER.` VBNTILATUR.

PPLIUATION FILED JULY 14. 1903,

UNITED STATES Patented November 10, 1903.

PATENT OEEIcE.

VENTILATO R.

SPECIFICATION forming part of Letters Patent No. 743,987, dated NovemberlO, 1903.

l Application led July 14, 1903. Serial 310.165,435. (No model-l To LZ whom t may concern:

Be it known that I, EDWARD P. OLIVER, of Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Ventilators, of which the following is a specification.

rlhis invention has relation to ventilators for securing the elfective ventilation of a room without the formation of draft therethrough; and it consists of a fiat plate or bar attached to the lower rail of the upper sash of a window and adjustable with relation to the pane of the lower sash, so as' to permit the passage of more or less air between the sashes when one of the sashes is moved with relation to the other to bring the meetingrails into diiferent planes, said plate or bar being arranged as described, so that it will not interfere with the usual fastenings that are employed for securing the sashes together and which are usually located upon the top rail of the lower sash.

On the drawings, Figure l represents a longitudinal vertical section of a window-frame equipped with the invention. Fig. 2 represents the bottom rail of the upper sash with the Ventilating strip or plate attached thereto. Fig. 3 represents the shape of the plate or strip where the lower sash has two panes. Fig. e represents an enlarged section through the lower portionof the upper sash. Fig. 5 represents a perspective view of the bar which is utilized to close the space or aperture made by raising the lower sash to render the ventilating device effective.

On the drawings the upper and lowersashes.

are indicated, respectively, at a and o, and their meeting-rails are respectively indicated at a' b. 0n the top rail h' may be located the usual sash-fastening devices, which coperate with coacting members located upon the top sash-rail ct. When the lower sash is raised, as shown in Fig. 1, it leaves a relatively large open space between the two rails, which, if not more or less closed, would permit the admission of a relatively great amount of air into the room, and thus greatly reduce the temperature thereof and cause a draft through the room. For the purpose of more or less closing this space without in any wise interfering with the operation of the sash-fastening device'there is adjustably secured to the under face of the rail a', a bar, plate, or

strip c, formed of any suitable material, as

wood, brass, galvanized iron,v or the like.`

This plate is provided with transverse slots c', through which the fastening devices may be inserted into the rail for the purpose of adj ustably holding the strip thereto. As illustrated, the fastening device may consist of a screw d, embedded in the rail ot', having on its projecting end a milled nut d', the upper part of which bears against the plate and holds it against the under face of the rail. Preferably this plate c' is adjusted so that its edge c2 is parallel to and in relatively close proximity to the pane of the sash' b, so as to leave a narrow slot or throat through which a thin sheet of air may pass between the said plate and the pane into the room when one of the sashes is raised or lowered relative to the other, so as to removevits rail out of the plane of the other rail. After the plate has been once adjusted it is generally unnecessary to readjust it or to remove it, as it interferes in no wise with the closing of the windowpand by reason of its small size andposition on the under side of the lower rail of the upper sash is inconspicuous and not likely to be noticed. To close the aperture left by raising the lower sash, I utilize a bar e, which is placed upon the window-sill under the lower rail of the lower sash.

I claim-y The combination with the upper and lower sashes of a window, of a fiat plate or strip secured to the under face of the lower rail of the upper sash and projecting partially inwardly beyond said rail toward the pane of the lower sash so as to leave a narrow throat or space between the edge of said plate and said pane, and means for adjustably holding said plate or strip in place nearer to or farther from the pane of theV lower sash, said parts being arranged and located as described whereby said plate occupies an inconspicuons position without interference with the usual sash-fastening devices.

In testimony whereof I have anxed my signature in presence of two witnesses.

EDWARD RTOLIVER.

Witnesses:

MARCUS l. MAY, A. D. HARRISON. 

